فهرست نشریات علمی دسترسی آزاد ایران

Background: Electromagnetic fields (EMF) are associated with oxidative stress, which is in turn associated with reactive oxygenspecies (ROS), anemia, and hypoxia.Objectives: This study focused on the synergistic effects of lead ions and EMF on oxidative modifications in hemoglobin (Hb) andplasma proteins.Patients and Methods: In this experimental study, the blood samples were obtained from age- and sex-matched healthy subjectsat Arak University of Medical Sciences, Arak, Iran. The collected bloods were prepared as 55 samples and then divided into differentgroups for incubating with 0 to 100 uM of lead ions in 2 mT and 50 Hz of EMF for 120 minutes. The carbonyl group was determinedto be an oxidative biomarker in plasma proteins. The ferric reducing ability of plasma (FRAP) was considered to be an antioxidantpower of human plasma. The conformational changes in hemoglobin, met-Hb, and hemichrome were considered to be oxidativemarkers in red blood cells. To predict the factors affecting the oxyHb, the artificial neural network (MLP: 11,2,2,1) in SPSS software wasapplied.Results: The test subjects showed increased concentrations of metHb (1.8  0.19 vs. 1.36  0.25) and hemichrome (6.01  0.57) inrelation to the control subjects. The decreased absorbance at 340nm(0.880.09 vs. 1.070.08) demonstrated the reduced interactionbetween the globin chain and the heme ring. The decreased absorbance at 420nm(Soret band) (2.960.13) and the increasedabsorbance at 630nm(0.070.002 vs. 0.0640.005) indicated the conversion of oxyHb to metHb, which confirmed the oxidativedamage to the erythrocytes. The linear regression analysis showed significant positive correlations between lead concentration andthe percentage of plasma carbonyl content (R2 = 0.96), the relation of plasma carbonyl content to Hb absorbance at 630 nm (R2 =0.97), and the relation of plasma carbonyl content to metHb concentration (R2 = 0.95) after 120 minutes incubation with lead ionsin 20 millitesla and 50 hertz EMF. The artificial neural network analysis showed the significant importance of hemichrome, PCO,metHb, and lead concentration to the oxyHb content of erythrocytes.Conclusions: Lead contamination in the presence of an EMF exacerbates the oxidative damage to plasma proteins as well as theconformational changes inHb. Anartificial neural network can be used as a predictive tool for the oxidative danger posed to workersin industrial fields, battery manufacturing companies, and power plants.